Is CVE-2026-31804 actively exploited?

No active exploitation of CVE-2026-31804 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31804 be exploited remotely?

Yes. CVE-2026-31804 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31804?

CVE-2026-31804 has a CVSS score of 4.0 (MEDIUM).

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MEDIUM

CVE-2026-31804

CWE-918Published: March 30, 2026· Updated: Apr 1, 2026

4.0

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.7th

Official Description

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the /pms_image_proxy endpoint accepts a user-supplied img parameter and forwards it to Plex Media Server's /photo/:/ transcode transcoder without authentication and without restricting the scheme or host. The endpoint is intentionally excluded from all authentication checks in webstart.py, any value of img beginning with http is passed directly to Plex, this causes the Plex Media Server process, which typically runs on the same host or internal network as Tautulli, with access to RFC-1918 address space, to issue an outbound HTTP request to any attacker-specified URL. This issue has been patched in version 2.17.0.

NVD Source

Technical Analysis

CVE-2026-31804 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.